1988836088121 has 9 divisors (see below), whose sum is σ = 2872769349541. Its totient is φ = 1325887904892.

The previous prime is 1988836088093. The next prime is 1988836088131. The reversal of 1988836088121 is 1218806388891.

The square root of 1988836088121 is 1410261.

It is a perfect power (a square), and thus also a powerful number.

1988836088121 is a `hidden beast` number, since 1 + 9 + 8 + 8 + 8 + 3 + 608 + 8 + 12 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1988836088121 - 2¹³ = 1988836079929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988836088131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3995740 + ... + 4465826.

Almost surely, 2^{1988836088121} is an apocalyptic number.

1988836088121 is the 1410261-st square number.

1988836088121 is the 705131-st centered octagonal number.

It is an amenable number.

1988836088121 is a deficient number, since it is larger than the sum of its proper divisors (883933261420).

1988836088121 is an frugal number, since it uses more digits than its factorization.

1988836088121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940180 (or 470090 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 63.

The spelling of 1988836088121 in words is "one trillion, nine hundred eighty-eight billion, eight hundred thirty-six million, eighty-eight thousand, one hundred twenty-one".